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Delete all but the most recent X files in bash
...spaces" is dangerous. Consider a name that contains literal quotes: touch 'foo " bar' will throw off the whole rest of the command.
– Charles Duffy
Jan 18 '16 at 16:55
2
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jquery data selector
...features you add, the slower it'll be. If the logic is complex, then use $(foo).filter(function(){...}).
– James
May 24 '10 at 12:21
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How to generate a random int in C?
...enSSL (or other userspace PRNGs).
For example:
#include "sodium.h"
int foo()
{
char myString[32];
uint32_t myInt;
if (sodium_init() < 0) {
/* panic! the library couldn't be initialized, it is not safe to use */
return 1;
}
/* myString will be an array o...
JPQL IN clause: Java-Arrays (or Lists, Sets…)?
...ateQuery(qlString, Item.class);
List<String> names = Arrays.asList("foo", "bar");
q.setParameter("names", names);
List<Item> actual = q.getResultList();
assertNotNull(actual);
assertEquals(2, actual.size());
Tested with EclipseLInk. With Hibernate 3.5.1, you'll need to surround the ...
How do I import the Django DoesNotExist exception?
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This is how I do such a test.
from foo.models import Answer
def test_z_Kallie_can_delete_discussion_response(self):
...snip...
self._driver.get("http://localhost:8000/questions/3/want-a-discussion")
try:
answer = Answer.objects.get(body__exact ...
How to install the Raspberry Pi cross compiler on my Linux host machine?
I am attempting to get cross-compiling for Raspberry Pi working on my Ubuntu machine.
8 Answers
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Expanding tuples into arguments
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Note that you can also expand part of argument list:
myfun(1, *("foo", "bar"))
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Fast way to discover the row count of a table in PostgreSQL
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I did this once in a postgres app by running:
EXPLAIN SELECT * FROM foo;
Then examining the output with a regex, or similar logic. For a simple SELECT *, the first line of output should look something like this:
Seq Scan on uids (cost=0.00..1.21 rows=8 width=75)
You can use the rows=(\d...
What is the advantage of using abstract classes instead of traits?
...xtend, all the others get with, that's it. Think of with as a comma: class Foo extends Bar, Baz, Qux.
– Jörg W Mittag
May 20 '19 at 8:23
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Principles for Modeling CouchDB Documents
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